Merge tag 'tegra-for-4.3-memory' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/drivers

ARM: tegra: Memory controller updates for v4.3-rc1

Adds support for Tegra210, which allows the SMMU to be used on this new
SoC generation.

* tag 'tegra-for-4.3-memory' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  memory: tegra: Add Tegra210 support
  memory: tegra: Add support for a variable-size client ID bitfield
  memory: tegra: Expose supported rates via debugfs

Signed-off-by: Olof Johansson <[email protected]>

Author: olofj

drivers/iommu/Kconfig

@@ -222,7 +222,7 @@ config TEGRA_IOMMU_SMMU
 	select IOMMU_API
 	help
 	  This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
-	  SoCs (Tegra30 up to Tegra132).
+	  SoCs (Tegra30 up to Tegra210).
 
 config EXYNOS_IOMMU
 	bool "Exynos IOMMU Support"

drivers/memory/tegra/Makefile

@@ -4,6 +4,7 @@ tegra-mc-$(CONFIG_ARCH_TEGRA_3x_SOC)  += tegra30.o
 tegra-mc-$(CONFIG_ARCH_TEGRA_114_SOC) += tegra114.o
 tegra-mc-$(CONFIG_ARCH_TEGRA_124_SOC) += tegra124.o
 tegra-mc-$(CONFIG_ARCH_TEGRA_132_SOC) += tegra124.o
+tegra-mc-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210.o
 
 obj-$(CONFIG_TEGRA_MC) += tegra-mc.o
 

drivers/memory/tegra/mc.c

@@ -42,7 +42,6 @@
 #define  MC_ERR_STATUS_ADR_HI_MASK 0x3
 #define  MC_ERR_STATUS_SECURITY (1 << 17)
 #define  MC_ERR_STATUS_RW (1 << 16)
-#define  MC_ERR_STATUS_CLIENT_MASK 0x7f
 
 #define MC_ERR_ADR 0x0c
 
@@ -66,6 +65,9 @@ static const struct of_device_id tegra_mc_of_match[] = {
 #endif
 #ifdef CONFIG_ARCH_TEGRA_132_SOC
 	{ .compatible = "nvidia,tegra132-mc", .data = &tegra132_mc_soc },
+#endif
+#ifdef CONFIG_ARCH_TEGRA_210_SOC
+	{ .compatible = "nvidia,tegra210-mc", .data = &tegra210_mc_soc },
 #endif
 	{ }
 };
@@ -283,7 +285,7 @@ static irqreturn_t tegra_mc_irq(int irq, void *data)
 		else
 			secure = "";
 
-		id = value & MC_ERR_STATUS_CLIENT_MASK;
+		id = value & mc->soc->client_id_mask;
 
 		for (i = 0; i < mc->soc->num_clients; i++) {
 			if (mc->soc->clients[i].id == id) {
@@ -410,6 +412,8 @@ static int tegra_mc_probe(struct platform_device *pdev)
 		return err;
 	}
 
+	WARN(!mc->soc->client_id_mask, "Missing client ID mask for this SoC\n");
+
 	value = MC_INT_DECERR_MTS | MC_INT_SECERR_SEC | MC_INT_DECERR_VPR |
 		MC_INT_INVALID_APB_ASID_UPDATE | MC_INT_INVALID_SMMU_PAGE |
 		MC_INT_SECURITY_VIOLATION | MC_INT_DECERR_EMEM;

drivers/memory/tegra/mc.h

@@ -41,4 +41,8 @@ extern const struct tegra_mc_soc tegra124_mc_soc;
 extern const struct tegra_mc_soc tegra132_mc_soc;
 #endif
 
+#ifdef CONFIG_ARCH_TEGRA_210_SOC
+extern const struct tegra_mc_soc tegra210_mc_soc;
+#endif
+
 #endif /* MEMORY_TEGRA_MC_H */

drivers/memory/tegra/tegra114.c

@@ -944,5 +944,6 @@ const struct tegra_mc_soc tegra114_mc_soc = {
 	.num_clients = ARRAY_SIZE(tegra114_mc_clients),
 	.num_address_bits = 32,
 	.atom_size = 32,
+	.client_id_mask = 0x7f,
 	.smmu = &tegra114_smmu_soc,
 };

drivers/memory/tegra/tegra124-emc.c

@@ -1027,7 +1027,40 @@ static int emc_debug_rate_set(void *data, u64 rate)
 DEFINE_SIMPLE_ATTRIBUTE(emc_debug_rate_fops, emc_debug_rate_get,
 			emc_debug_rate_set, "%lld\n");
 
-static void emc_debugfs_init(struct device *dev)
+static int emc_debug_supported_rates_show(struct seq_file *s, void *data)
+{
+	struct tegra_emc *emc = s->private;
+	const char *prefix = "";
+	unsigned int i;
+
+	for (i = 0; i < emc->num_timings; i++) {
+		struct emc_timing *timing = &emc->timings[i];
+
+		seq_printf(s, "%s%lu", prefix, timing->rate);
+
+		prefix = " ";
+	}
+
+	seq_puts(s, "\n");
+
+	return 0;
+}
+
+static int emc_debug_supported_rates_open(struct inode *inode,
+					  struct file *file)
+{
+	return single_open(file, emc_debug_supported_rates_show,
+			   inode->i_private);
+}
+
+static const struct file_operations emc_debug_supported_rates_fops = {
+	.open = emc_debug_supported_rates_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static void emc_debugfs_init(struct device *dev, struct tegra_emc *emc)
 {
 	struct dentry *root, *file;
 	struct clk *clk;
@@ -1048,6 +1081,11 @@ static void emc_debugfs_init(struct device *dev)
 				   &emc_debug_rate_fops);
 	if (!file)
 		dev_err(dev, "failed to create debugfs entry\n");
+
+	file = debugfs_create_file("supported_rates", S_IRUGO, root, emc,
+				   &emc_debug_supported_rates_fops);
+	if (!file)
+		dev_err(dev, "failed to create debugfs entry\n");
 }
 
 static int tegra_emc_probe(struct platform_device *pdev)
@@ -1119,7 +1157,7 @@ static int tegra_emc_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, emc);
 
 	if (IS_ENABLED(CONFIG_DEBUG_FS))
-		emc_debugfs_init(&pdev->dev);
+		emc_debugfs_init(&pdev->dev, emc);
 
 	return 0;
 };

drivers/memory/tegra/tegra124.c

@@ -1032,6 +1032,7 @@ const struct tegra_mc_soc tegra124_mc_soc = {
 	.num_clients = ARRAY_SIZE(tegra124_mc_clients),
 	.num_address_bits = 34,
 	.atom_size = 32,
+	.client_id_mask = 0x7f,
 	.smmu = &tegra124_smmu_soc,
 	.emem_regs = tegra124_mc_emem_regs,
 	.num_emem_regs = ARRAY_SIZE(tegra124_mc_emem_regs),
@@ -1067,6 +1068,7 @@ const struct tegra_mc_soc tegra132_mc_soc = {
 	.num_clients = ARRAY_SIZE(tegra124_mc_clients),
 	.num_address_bits = 34,
 	.atom_size = 32,
+	.client_id_mask = 0x7f,
 	.smmu = &tegra132_smmu_soc,
 };
 #endif /* CONFIG_ARCH_TEGRA_132_SOC */